Locking and tripping device for alpha power lift implement



Nov. 22, 1932. J, A. VAUGHN 1,888,482

LOCKING AND TRIPPING DEVICE FOR A POWER LIFT IMPLEMENT Filed Oct. 12,1931 2 Sheets-Sheet l Inventor 'Jesse A. Vaqg/m Atmmeyg Nov. 22, 1932.J. A. VAUGHN 1,888,482

LOCKING AND TRIPPING DEVICE FOR A POWER LIFT IMPLEMENT Filed- Oct. 121951 2 Sheets-Sheet 2 IIIIIYII IL A I nvenlor Jesse A. Vaqg/m By @MwAttorney 5 Patented Nov. 22, 1932 uai'ren STATES Parent caries JESSE A.VAUGHN, OF LOS ANGELES, CALIFORNIA, ASSIGNOR TO KILLE-FER M'AHUFAO-TURIIIG CORPORATION, LTD., OF LOS ANGELES, CALIFORNIA, A COREORATION OFCALIFORNIA LOOKING AND TEIPPING DEVICE A lOWEB. LIFT IMPLEMENT'Application filed October 12, 1931. Serial No. 568,258.

This invention relates to an improved loc rin and tri my device for aower 11ft e P v agricultural implement, or tne like.

The principal object of this invention is to provide an improved lockingand tripping device for a power lift agricultu *al tool which willsecurely lock theimplement in elevated carrying position, and which maybe ver; easily released to permit the implement to rop, due to gravity,into its operative position. I

A further object of this invention is to pro vide a means for lockingthe implement in elevated carrying position which means is securelyretained in looking position due to a toggle locking effect and arrangedwhereby the thrust against the locking means caused by the forces of.gravity acting to lower the implement into working position will assistthe toggle locking eiiect to more securely retain the implementelevated. 7

A further object of this invention is to provide a means for locking theimplement in elevated carrying position, which locking means is securelyretained in looking position due to a toggl locking ,etl -ect and whichmeans will be self-acting to release the implement fr in its elevatedposition when the toggle locking effect has been disrupted.

A- further object of this invention is to provide a locking meansforfret-aining a heavy earth working implement in elevated position andso arranged that the weight thereof will assist the locking means inretaining the implement elevated for utilining the weight of theimplement tor actuating the locking means to release the implement fromits elevated position when the locking means has been tripped orreleased.

Anyon who has operated an agricultural implement of the heavy type,readily appreciates the fatiguing eitect of continually actuatin g atrip release lever which offers con- I siderable resistance. t is,therefore, a further object of this invention to provide a Other objectsand advantages of this invention will be apparent as the nature of thesame is more fully understood from the fol-,

emplification, and that variation therefrom V in details 01 constructionor arrangement of the parts may accordingly be effected and yet remainwithin the splrit and scope of the in- .vention as the same is set"forth in the appended claims.

In the drawings:

Fig. 1 illustrates a side elevation of an agricultural implement havingthe invention applied thereto.- Aportion of the ground wheel has beenbroken away to more clearly illustrate the tripping device. a n

Fig. 2 illustrates an enlarged tragmental view, partly in section,,ofthe upper portion of the implement, in which the parts are illustratedin the position they assume when the implement is locked in elevatedposition.

Fig. 3 illustrates a view similar to Fig. 2, except that the parts areillustrated in the position they assume when the implement has droppedinto operativeposition.

Fig. t is a fragmental cross sectional view,

taken substantially in the plane indicated by the line l'el of Fig. 2,and looking in the direction of the arrows.

Fig. 5 is a tragmental cross sectional view, taken substantially in theplane indicated by the line. 55 of Fig. 2, and looking in the directionof the arrows.

My improved locking and tripping device may be applied'with advantage toany form or type of earth working or carrying tool, such as a plow,cultivator, harrow, scraper, or the lflre, For the purpose ofillustration, I have shown my invention as applied to that form ofagricultural implement, illustrated and described in the patent to A.VJ. Hudson, No. 1,710,222, dated April 22, 1929, which form of implementis commonly referred to as a subsoil plow. i

In Fig. 1 my invention is applied to a subof the control bar is obtainedautomatically by the weight of the implement.

The implement may be elevated as fully escribed in the previouslymentioned patent to A. Hudson, by swinging the hooks 5 to engage thetrundle wheels l and when the implement is elevated to the predeterminedelevation, the hooks are automatically disengaged from the trundlewheels to stop fur ther lifting thereof. Slightly before the liftingmeans release, it is desirable to lock the implement in its elevatedposition, which locking is accomplished by having the latch 22 returnedto its initial position after unlocking the control bar by means ofspring 33, suitably connecting the frame and release lever 26 (noteFigs. 2 and As will be observed from the drawings,the rear face of thelatch 22, adjacent the upper end thereof, is inclined as at 34 to enablethe roller 21 to ride thereon to lift the-control bar over the end ofthe latch lever 22 and it is shortly after the roller 21 passed over theupper end of the latch lever that the elevating means is automaticallydisconnected and if it were not forthe stop roller 1 engaging theforward face of the latch the implement would return to its operativeposition.

To aid the control bar in dropping into locking position, a spring 35 isprovided. It is also desirable to return the hooks 5 to their inactiveposition when automatically released from thetrundle wheelsand'therefore spring 35 is connected at one end to a forwardly extendingportion 6a of the elevating lever 6 while the other end of spring 35 issuitably connected to the control bar, and tons spring 35 is utilizedfor a dual purpose.

While I have illustrated 1e preferred form of my invention, it is to beunderstood that the foregoing description is for illustrative purposesonly, and I do not desire to be limited by any of the details shown ordescribed, QXCQPt as defined in the appended claims.

1 claim:

1. A look and release device for an earth working implementof the lifttype including a sliding control bar, a latch means for looking saidbar, a toggle means for retaining said latch in locking position, and arelease means operable for actuating said toggle means to release saidlatch means for unlocking said control bar.

2. A look and release device for an earth working implement of the lifttype including, a sliding control bar, a latch means for looking saidbar, a toggle means for retaining said latch in looking position, and arelease means operable for actuating said toggle means to release saidlatch for unlocking said control bar, and a spring means for returningsaid latch to locking position.

3.'A lock and release device for an earth working implement of the lifttype includ- 1 i8 ver ing, a sliding control bar, a stop carried there--by, a latch, adapted to engage said stop for locking said bar, a linkpivoted to said latch, a crank arm pivoted to said link and adapted toform a toggle lock therewith for retaining said latch in lookingposition, and means for rotating said crank arm for disrupting saidtoggle locking eifect and for actuating said latch to unlock saidcontrol bar.

4. A look and release device for an earth working implement of the lifttype including, a sliding control bar, a stop carried thereby, a latchadapted to engage said stop for locking said bar, a link pivoted to saidlatch, a crank arm pivoted to said link and adapted to form a togglelock therewith for retaining said latch in looking position, means forrotating'said crank arm for disrupting said toggle locking effect andfor actuating said latch to unlock said control bar, and spring meansfor returning said latch to locking position.

5. A look and release device for an earth working implement of the lifttype including, a sliding control bar, a stop carried thereby, a pivotedlatch having one end adapted to engage said stop, a link pivoted to theother end of said latch, a crank arm pivotally connected to said linkand adapted to form a toggle lock therewith for retaining said latch inlooking position, and means for rotating said crank arm for disruptingsaid toggle locking ellect and for actuating said latch to unlatch saidcontrol bar.

6. A look and release device for an earth working implement of the lifttype including a sliding control bar, a stop carried thereby, a pivotedlatch having one end adapted to engage said stop, a link pivoted to theother end of said latch, a crank arm pivotally connected to said linkand adapted to form a toggle lock therewith for retaining said latch inlocking position, means for rotating said crank arm for disrupting saidtoggle locking effect and for actuating said latch to unlock saidcontrol bar, and a spring means

